Process for preparing soda ash from solution mined bicarbonate brines
US6589497B2 · kind B2 · utility
30Cited by
14References
9Claims
0Family size
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Key dates
| Filing date | Jun 13, 2001 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Jul 13, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D7/126
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing high grade soda ash from a solution mined brine containing sodium bicarbonate by processing the mine brine through a monohydrate crystallization step to the final product is described. The mine brine is treated to decompose and thereby convert sodium bicarbonate to sodium carbonate and to concentrate the sodium carbonate to a concentration such that a feed liquor is formed which is suitable for crystallizing sodium carbonate monohydrate crystals of high purity from the feed liquor. The sodium carbonate monohydrate crystals recovered from the process are converted to soda ash by known techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.